Since the 14th of October, the KitKat's twitter page is posting one picture a day, relating to Android's new operating system.
The first was a '007' pic, were only the number seven was made out of Kitkats. The next day a new picture was posted, with the Android mascot made out of chocolate, in with if we count the KitKat bars from the body and both arms, we get the number six.
On the 16th comes a new picture, were you could read 'This is it', but the two 'S' resembled the number 5.
4h ago came a new picture, with only 4 KitKat bars and 'KitKat 4.4' written on the side...

If everything goes according to plan, tomorrow we should see something with the number 3 embed on it.
This actually makes sense, with Apple's event confirmed for the 22nd of October, in which they are supposed to launch the new iPad.